EP2643275A1 - Novel cement that is resistant to internal sulphate reactions and to external sulphate attacks - Google Patents
Novel cement that is resistant to internal sulphate reactions and to external sulphate attacksInfo
- Publication number
- EP2643275A1 EP2643275A1 EP11802504.8A EP11802504A EP2643275A1 EP 2643275 A1 EP2643275 A1 EP 2643275A1 EP 11802504 A EP11802504 A EP 11802504A EP 2643275 A1 EP2643275 A1 EP 2643275A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cement
- concrete
- sulphate
- prepared
- mortar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004568 cement Substances 0.000 title claims abstract description 87
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 title abstract description 33
- 229910021653 sulphate ion Inorganic materials 0.000 title abstract description 29
- 238000006243 chemical reaction Methods 0.000 title abstract description 19
- 239000004567 concrete Substances 0.000 claims abstract description 65
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 32
- 239000011440 grout Substances 0.000 claims abstract description 10
- 229910021487 silica fume Inorganic materials 0.000 claims description 16
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 9
- 229910001653 ettringite Inorganic materials 0.000 description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000007792 addition Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 238000002441 X-ray diffraction Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 5
- 230000003111 delayed effect Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000008961 swelling Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000001175 calcium sulphate Substances 0.000 description 2
- 235000011132 calcium sulphate Nutrition 0.000 description 2
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 241001504564 Boops boops Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910052925 anhydrite Inorganic materials 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002447 crystallographic data Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000008030 superplasticizer Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/02—Portland cement
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/345—Hydraulic cements not provided for in one of the groups C04B7/02 - C04B7/34
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2015—Sulfate resistance
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Definitions
- the present invention relates to a new cement for the preparation of concrete, grout or mortar resistant to internal sulfatic reactions and external sulphate attacks.
- Concrete is a composite building material made from natural aggregates (sand, chippings) or artificial aggregates (light aggregates) agglomerated by a binder, usually a cement.
- Concrete is commonly used for the construction of civil engineering works, buildings and for the manufacture of prefabricated elements. These structures require a concrete made with a cement which guarantees specific technical and mechanical characteristics, in particular with regard to setting time and resistance to short and long term.
- Ettringite is a mineral species composed of calcium sulphate and aluminum hydrate, with the chemical formula Ca 6 Al 2 (SO 4 ) 3 (OH) 12.2H 2 0.
- Ettringite is a product of the reaction between l C 3 A tricalcium aluminate, sulfate and water.
- Ettringite can form during the setting of the concrete: it is called primary ettringite.
- the formation of primary ettringite favors the setting of the concrete and does not present any danger for the durability of this one. However, sometimes ettringite does not form during the setting of concrete but after it.
- Delayed ettringitis can occur several years after the completion of the work.
- the swelling is then responsible for major disorders in the concrete structure that result visually in the appearance of cracks likely to severely damage said concrete and therefore the structure.
- the observed cracking can take the form of a multidirectional network and cracks can open up to a few millimeters.
- a first solution consists in preparing cements containing mineral additives such as ground blast furnace slag or fly ash in large proportions. These additions make it possible to dilute the clinker and to limit the risks of internal sulphate reaction and their intensity. However, the workability of the concrete prepared from these cements is less good and their technical performance is weakened.
- the cements thus prepared do not therefore meet the technical specifications required for the construction of civil engineering works and buildings with massive elements in contact with water or subjected to a very humid environment.
- a second solution is to use CEM I ES type cement according to the standard NF P 15-319 (hydraulic binders - cements for work in water with high sulfate content - designated by ES).
- Some cements that meet this standard contain 2.7% C 3 A (value calculated by the Bogue calculation as defined in the LEA's Chemistry of Concrete and Concrete (4th edition), edited by PC Hewlett, p.154). and 2.25% of $.
- C 3 A value calculated by the Bogue calculation as defined in the LEA's Chemistry of Concrete and Concrete (4th edition), edited by PC Hewlett, p.154). and 2.25% of $.
- the use of these cements did not make it possible to prevent the formation of delayed ettringite due to internal sulphate reactions in the concretes thus prepared.
- the patent application FR 2357500 describes cements for the preparation of concretes resistant to most corrosive media, particularly concentrated solutions of nitrate and sulfate. Since the corrosion resistance caused by concentrated solutions of sulphate can not be confused with resistance to internal sulphate reactions and external sulphate attacks, this patent application does not deal with the same problem as that at the origin of the present invention. . In addition, this patent application teaches that it is essential for good resistance to sulphate attack that the cements contain more than 10% silica fume. However, the use of such amounts of silica requires the addition of a large amount of water to prepare the concrete, grout or mortar, which results in high consistencies of said concrete, grout or mortar, requiring a strong adjuvantation (superplasticizer). On the other hand, silica fume is an expensive product.
- the present invention relates to a cement comprising:
- cements including:
- the cement according to the present invention allows the preparation of a concrete, but also a grout or a mortar, having mechanical and technical performances, in particular a setting time and a resistance to short times, which allow their use for the construction of civil engineering works, buildings and for the manufacture of prefabricated elements, while strongly limiting the internal sulphate reactions and external sulphate attacks.
- C represents CaO
- the alumino ferrite calcium phase of a composition corresponding to the general formula C 4 AF is actually a (CaO) 4 (Al 2 O 3 ) (Fe 2 O 3 ) phase.
- the proportions expressed in% correspond to percentages by weight relative to the total weight of the considered entity (cement, concrete, grout or mortar).
- the phase contents correspond to phase contents measured by the X-ray diffraction analysis associated with the Rietveld calculation method (A Profile Processing Method for Nuclear and Magnetic Structures, HM Rietveld, J.
- the levels thus determined differ from the levels calculated according to the Bug calculation method (as defined in the LEA 'Chemistry of Concrete and Concrete (4th Edition), edited by PC Hewlett, p.154) which does not take into account possible minor elements present in the phases and modifications that these elements may introduce.
- the X-ray diffraction analysis associated with the Rietveld calculation method makes it possible to measure the phase contents actually present in a clinker or a cement taking into account the modifications and the changes of crystalline phases.
- the present invention therefore relates to a cement comprising less than 2% of $.
- the present invention relates to a cement as described above comprising less than 1.5% of $, more preferably less than 1% of $.
- the cement according to the present invention comprises a clinker as defined above.
- the present invention relates to a cement as described above comprising a clinker whose following characteristics are chosen alone or in combination:
- the clinker comprises less than 2% of C 3 A, preferably of 0% to 1.5% of C 3 A, most preferably 0% to 1% of C 3 A; and or
- the clinker comprises from 65% to 80% of C 3 S.
- the subject of the present invention is a cement comprising from 90% to 100% of a clinker as defined above, and from 0% to 10% of silica fume.
- the subject of the present invention is a cement as described above comprising less than 10% silica fume, more preferably from 0% to 5% silica fume, preferably still from 0% to 2% silica fume.
- the present invention relates to a cement as described above without silica fume.
- the cement according to the present invention may also contain gypsum to adjust the content of $, it being understood that it must remain less than 2%.
- the cement according to the present invention may be prepared by any method known to those skilled in the art.
- the cement according to the present invention can be prepared by a process comprising the following steps:
- the cement according to the present invention can be prepared from different raw materials such as limestone, clays and marls, iron oxide, siliceous sand and bauxite.
- the cement according to the present invention is particularly indicated in the preparation of concretes, it can also be used to prepare grouts or mortars.
- the present invention also relates to a concrete, a grout or a mortar comprising a cement as described above.
- the present invention relates to a concrete comprising a cement as described above.
- the present invention is illustrated in a nonlimiting manner by the following examples.
- the loss on ignition (975 ° C) is 1%.
- the cement thus prepared contains about 1% of $.
- the phasic composition of this cement is as follows (values measured by the X-ray diffraction analysis associated with the Rietveld calculation method):
- the heat of hydration of the cement of the invention is limited, which regulates heating during the setting of the concrete prepared from this cement.
- Example 2 - Cement 2 according to the invention
- the cement thus prepared contains about 0.9% of $ and 4% of silica fume.
- the phasic composition of this cement is as follows (values measured by the X-ray diffraction analysis associated with the Rietveld calculation method):
- the heat of hydration of the cement of the invention is limited, which regulates heating during the setting of the concrete prepared from this cement.
- Example 3 Concretes prepared from cements according to the invention
- a first concrete and a second concrete are prepared respectively from the cements of Example 1 (concrete 1) and Example 2 (concrete 2).
- the final composition of these concretes is as follows:
- Criterion 1 according to LPC Method No. 66 corresponds to:
- Criterion 2 according to LPC Method No. 66 corresponds to:
- the concretes of the invention do not develop internal sulphate reactions.
- the concrete 1 meets the criterion 1 of the LPC method No. 66 and the concrete 2 meets the criterion 2 of the LPC method No. 66, while the concrete prepared from the cement type CEM I 52.5N PM ES does not meets none of these criteria.
- a first mortar and a second mortar are prepared by mixing respectively the cements of Example 1 (mortar 1) and of Example 2 (mortar 2) with sand, water and an addition of calcium sulphate so that the $ content of the mortar is 7%.
- the mortars prepared from the cements according to the invention did not reach the limit fixed by ⁇ ASTM.
- the mortars prepared from the cements of the invention are very insensitive to external sulphate attacks.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1059740A FR2967999A1 (en) | 2010-11-25 | 2010-11-25 | NEW CEMENT RESISTANT TO INTERNAL SULFATIC REACTIONS AND EXTERNAL SULFUR ATTACKS |
PCT/FR2011/052744 WO2012069763A1 (en) | 2010-11-25 | 2011-11-24 | Novel cement that is resistant to internal sulphate reactions and to external sulphate attacks |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2643275A1 true EP2643275A1 (en) | 2013-10-02 |
EP2643275B1 EP2643275B1 (en) | 2018-10-31 |
Family
ID=44244715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11802504.8A Active EP2643275B1 (en) | 2010-11-25 | 2011-11-24 | Novel cement that is resistant to internal sulphate reactions and to external sulphate attacks |
Country Status (5)
Country | Link |
---|---|
US (1) | US9034099B2 (en) |
EP (1) | EP2643275B1 (en) |
CA (1) | CA2815799C (en) |
FR (1) | FR2967999A1 (en) |
WO (1) | WO2012069763A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111018400A (en) * | 2019-12-26 | 2020-04-17 | 新疆鑫研砼建筑工程有限公司 | High performance corrosion inhibitor |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103936312A (en) * | 2014-03-31 | 2014-07-23 | 济南大学 | Method for improving performance of alit cement clinker |
CN113526889B (en) * | 2021-07-02 | 2022-04-29 | 山东春禾新材料研究院有限公司 | Recycled aggregate and preparation method and application thereof |
CN113860819B (en) * | 2021-10-21 | 2022-04-29 | 交通运输部公路科学研究所 | Sulfate erosion preventing concrete and proportioning optimization method and application |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1054366B (en) * | 1957-10-25 | 1959-04-02 | Dyckerhoff Zementwerke Ag | Sulphate-resistant Portland cement |
RO72773B (en) * | 1976-07-09 | 1984-03-31 | Aksjeselskapet Norcem | Process for preparing non-corrodible concrete compositions |
DD230519A3 (en) * | 1983-07-15 | 1985-12-04 | Ruedersdorf Zementwerke | RAW MIXTURE FOR THE PREPARATION OF SULFATRESISTENT, ALKALIAR PORTLAND CEMENT |
DK361785D0 (en) * | 1985-08-08 | 1985-08-08 | Aalborg Portland Cement | FORMED ITEM |
JPH06100338A (en) * | 1992-09-18 | 1994-04-12 | Mitsubishi Materials Corp | Highly fluid cement |
EP0877007B1 (en) * | 1996-04-16 | 2004-06-30 | Firebrick Trading, S.L. | Hydraulic cement |
MXPA02012235A (en) * | 2002-12-10 | 2004-07-16 | Cemex Trademarks Worldwide Ltd | White cement and white clinker with high-sulfur content coming from oil coke with high-sulfur content used as fuel. |
JP2005194171A (en) * | 2003-12-10 | 2005-07-21 | Cemex Trademarks Worldwide Ltd | Clinker and white portland cement having high sulfur content and derived from petroleum coke having high sulfur content and used as fuel |
US8029618B2 (en) * | 2004-09-21 | 2011-10-04 | Saudi Arabian Oil Company | Manufacture of Portland cement using spent claus catalyst |
JP4843271B2 (en) * | 2005-07-22 | 2011-12-21 | 宇部興産株式会社 | Cement composition for inhibiting alkali silica reaction and cement-containing composition |
WO2007064186A1 (en) * | 2005-11-30 | 2007-06-07 | Concretos Translúcidos, S. De R.L. De C.V. | Production method and cement compositions which rapidly acquire good strength and which are resistant to corrosion |
US8419851B2 (en) * | 2007-03-06 | 2013-04-16 | Nippon Steel & Sumitomo Metal Corporation | Sulfate resistant cement |
JP5139777B2 (en) * | 2007-11-14 | 2013-02-06 | 宇部興産株式会社 | Sulfate-resistant centrifugal molded concrete composition |
JP5178554B2 (en) * | 2009-01-27 | 2013-04-10 | 太平洋セメント株式会社 | Cement composition |
JP5455832B2 (en) * | 2010-07-28 | 2014-03-26 | 太平洋セメント株式会社 | Cement composition |
-
2010
- 2010-11-25 FR FR1059740A patent/FR2967999A1/en not_active Withdrawn
-
2011
- 2011-11-24 WO PCT/FR2011/052744 patent/WO2012069763A1/en active Application Filing
- 2011-11-24 CA CA2815799A patent/CA2815799C/en active Active
- 2011-11-24 US US13/990,013 patent/US9034099B2/en not_active Expired - Fee Related
- 2011-11-24 EP EP11802504.8A patent/EP2643275B1/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111018400A (en) * | 2019-12-26 | 2020-04-17 | 新疆鑫研砼建筑工程有限公司 | High performance corrosion inhibitor |
Also Published As
Publication number | Publication date |
---|---|
US20140137772A1 (en) | 2014-05-22 |
FR2967999A1 (en) | 2012-06-01 |
US9034099B2 (en) | 2015-05-19 |
CA2815799C (en) | 2019-04-09 |
CA2815799A1 (en) | 2012-05-31 |
EP2643275B1 (en) | 2018-10-31 |
WO2012069763A1 (en) | 2012-05-31 |
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